"Muslims' rights are forcibly seized in China, India, Palestine, Somalia, the Arabian Peninsula, the Caucasus, the Levant, Egypt, Iraq, Indonesia, Afghanistan, the Philippines, Ahvaz, Iran, Pakistan, Tunisia, Libya, Algeria and Morocco, in the East and in the West," he said according to an English translation of his speech posted online by Isis.

Isis leader Isis leader Abu Bakr al-BaghdadiAFP

"So raise your ambitions, O soldiers of the Islamic State! For your brothers all over the world are waiting for your rescue, and are anticipating your brigades."

Baghdadi claimed that the world is entangled in a new cold war, divided in "two trenches": "the camp of Islam and faith, and the camp of disbelief and hypocrisy".

"The time has come for you to free yourself from the shackles of weakness, and stand in the face of tyranny, against the treacherous rulers – the agents of the crusaders and the atheists, and the guards of the Jews," he said.

He made a special call to scholars, judges, doctors, engineers and people with military and administrative expertise to come and "answer the dire need of the Muslims for them."

The speech marked the Muslim holy month of Ramadan, which started last week and celebrates the revelation of the Quran to Prophet Muhammad.

It came after Isis conquered large swathes of Iraq and Syria and announced they have established an Islamic caliphate, extending from the Syrian city of Aleppo to Diyala province in eastern Iraq.

The militants have called upon Muslims everywhere to pledge allegiance to "Caliph Ibrahim" - Baghdadi.